水土流失遥感调查中植被信息提取与评价指标讨论

简要介绍了水土流失遥感调查植被因子提取的方法。采用植被指数像元二分模型的方法,以重庆市开县为试验区,证明该方法提取植被覆盖度的结果较理想。结合重庆市最新的水土流失遥感调查,指出了该次调查中存在的不足,并提出了有关建议。同时对水土流失遥感调查的评价指标进行了讨论。

Discussion on Vegetation Information Extraction and Evaluation Indexes in Soil and Water Loss Investigation by Remote Sensing

To prevent soil and water loss, remote sensing and GIS are often applied to soil and water loss investigation. This paper summarizes the techniques estimating vegetation factor by remote sensing in soil and water loss investigation. Vegetation fractional cover is estimated from NDVI using the dimidiate pixel model, by taking Kaixian County of Chongqing City for an example. Better results have been achieved using the technique. By combining the results with newly soil and water loss investigation by remote sensing in Chongqing City, flaws found in the investigation and the relevant suggestions are presented. The evaluation indexes for soil and water loss investigation by remote sensing are also discussed.